I love Mini Motorways, but it requires an Apple Gaming subscription.
The other game I’ve been hooked on lately is Tiny Towers.
The good: it’s chill, and it doesn’t force any ads on you unwittingly. There’s even a setting to turn off video ad offers, which makes it even easier to avoid ads.
Downsides: it’s F2P with micro transactions. That being said, it’s 100% possible to play without paying a cent.